ELAS, Electric Lift Augmenting Slats

Electric Lift Augmenting Slats (ELAS) is a combination of leading-edge slats and a series of small electric ducted fans (EDFs) accelerating the air in the gap between the slat and the main body wing airfoil. The ELAS Concept provides: JATO-like (Jet Assisted Takeoff) electric-powered boost on takeoff and climb out, descent and landing speed reduction, steeper approach angles, and improved low-speed margins and handling qualities. ELAS can be added to an existing airframe or built into the wings as original equipment. It can even be designed as retractable when not in use. Rather than the EDFs being used to solely add thrust, ELAS also provides a dramatic increase in lift by increasing the speed of the air over the top surface of the wing, a form of upper-surface-blowing.This work is built on earlier successful projects combined with recent advances in distributed electric propulsion.nbsp; The distributed, small electric ducted fans alter the airflow over the wing in ways not possible with two internal combustion engines (the Custer channel-wing) or multiple large turbines (the Boeing YC-14 and the NASA QSRA).nbsp;Further, ELAS can provide improved low-speed aircraft controlnbsp;through both the increase in maximum lift and stall angle, and differential power distribution. Command of the power distribution has the potential to reduce loss-of-control (LoC) during critical low-speed periods and provide improved handling qualities during gusts.nbsp;While there is a big push to develop eVTOL aircraft, ELAS offers a much shorter path to near-eVTOL capability. This claim is supported by the following Phase I findings: 1) Anbsp;variety of small aircraft equipped with ELAS can takeoff and approach/land with near-helicopter-like profiles. 2)nbsp;Can be attached to existing aircraft or built into new aircraft:nbsp;lower acquisition and recurring costs than eVTOL. 3)nbsp;50%-100% more range with more payload than comparable eVTOL. 4) next-gen battery technology is not required. 5) Uses Off-The-Shelf hardware.